The American Journal of Science and ArtsS. Converse, 1860 - Geology |
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Page 76
... color from brown to black , is dull where not polished as just mentioned , has a reddish - brown lustreless streak , its powder is dark chocolate colored , it is very tough and breaks at last with a hackly fracture , its specific ...
... color from brown to black , is dull where not polished as just mentioned , has a reddish - brown lustreless streak , its powder is dark chocolate colored , it is very tough and breaks at last with a hackly fracture , its specific ...
Page 82
... color . The cloud bank , which extended 60 ° in azimuth , was elevated some- what above the horizon , so that stars were seen beneath it . The centre of the auroral light was not in the north , but N.N.W. On the west it was bounded by ...
... color . The cloud bank , which extended 60 ° in azimuth , was elevated some- what above the horizon , so that stars were seen beneath it . The centre of the auroral light was not in the north , but N.N.W. On the west it was bounded by ...
Page 83
... color , those in the southeast were pur- ple , alternately brightening and fading to a whitish color . At midnight , all disappeared except the arch , and at intervals un- dulating flashes of light appeared , not visible longer than ...
... color , those in the southeast were pur- ple , alternately brightening and fading to a whitish color . At midnight , all disappeared except the arch , and at intervals un- dulating flashes of light appeared , not visible longer than ...
Page 84
... color was red and its different shades . The aurora of Sept. 1st was scarcely at all marked with any of these colors . The light was chiefly white , resembling the dawn just before sunrise . 6. The aurora of Aug. 28th was most brilliant ...
... color was red and its different shades . The aurora of Sept. 1st was scarcely at all marked with any of these colors . The light was chiefly white , resembling the dawn just before sunrise . 6. The aurora of Aug. 28th was most brilliant ...
Page 86
... color , deepening as it neared the eastern horizon , to a bright crimson , and at the western end , near the star ... color , with no perceptible motion E. and W. Shooting slowly up towards the zenith , at an altitude of about 45 ...
... color , deepening as it neared the eastern horizon , to a bright crimson , and at the western end , near the star ... color , with no perceptible motion E. and W. Shooting slowly up towards the zenith , at an altitude of about 45 ...
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acid Alethopteris alloy American animal appear Arago arch arsenic aurora axis ball Berghaus Annalen bituminous Brgt bright brilliant Cape Cape Henry carbon carbonic acid catalogues chemical clouds coal coal-tar color containing Cordaites crystals diameter direction disinfection distance distillation earth eupion experiments fact feet fossil genera genus Göpp Gulf Stream heat horizon inches initial velocity Jour Journal Kämtz latitude Lepidodendron light Lsqx mass matter metal meteor miles mineral motion nearly nebular hypothesis Neuropteris Noble County northern observations obtained Oil-Coal organic oxygen paraffine Pecopteris peculiar phenomena plants portion present produced Prof rays remarkable rifle river seen Semi-minor axis Sept shales Sigillaria solar species specimens Sphenopteris stars Sternb stone strata streamers substances surface Survey temperature theory thickness tion toises Unifilar vapor volatile whole zenith zenith telescope zinc